automatic read only connection for front end

[nolanjannotta]

Hey guys, new-ish web3-react user here,

I'm building a front end and I want to use an alchemy api key to automatically connect, read the contract and populate data from the blockchain in my front end. Then, when a user wants to write to it, they would need to connect metamask. to automatically connect and read, would I use the url connector? I'm currently using injected connector to connect to metamask.
Is there any example code where the url connector is used or docs where its explained?

Thanks!